Abstract: The method for shredding wornout tire cases comprises exposing wornout tire cases to the effect of an explosion exerted thereon in a closed circular system so as to establish a directional circulating flow of explosion products. The device for carrying the method into effect comprises a chamber (1, 2) and a piping (3, 4) which forms, together with the chamber, a circular closed system, the chamber has a portion shaped as a cone-frustum shell (1), wherein shredding members (7) and a fixing unit of the explosive (13) are accommodated; a the smaller-diameter portion of the cone-shaped shell (1) communicates with one end of the piping (4) through a valve appearing as, e.g., a grid established by plates (7) in the area of the smaller base of the shell (1), while the other end of the piping (3) communicates with the chamber (1, 2) from the side of the larger-diameter portion of the cone-shaped shell (1).